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Re: leak from air condition on floor not loosing Drain...
There is a hose that comes through the firewall on the passenger side, it is the condensate line for the AC unit, it gets clogged up with bugs, dirt, wasps, etc, clear it out, it will flood the floor if it is blocked. It looks like a little bent rubber hose, it doesn't look like one, it is one. Check it out.
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It's possible that the condensate drain for the air conditioning evaporator is plugged. This will water on the carpet on humid days to form quickly. If there is antifreeze in the water then the heater core is leaking.
2 most common causes (Heater core leak water warm & radiator loosing water try turning off your heater) 2nd cause blocked drain on air conditioning water cold. 3rd cause a gromet or seal needs repaceing.
I own a 2001 Ford Taurus and two years ago it was losing anti freeze also. Found out that the plastic recovery tank located in front of right strut mount on fender well, had a small stress crack. It only leaked when engine was at opperating temperature. If that is not the solution, check all your spark plugs for a green-ish or yellow-ish color you have a cracked head. If they all have a light tan to dark tan color (on the white porcelin) you're good. One final check would be the crankcase oil. If the oil on the dip stick has a creamy look to it then your leak is in the intake manifold and also if the oil is oddly over full. If all these inspections turn up good you then have a external leak and need to have the engine at opperating temperature and park it on a clean surface over night. Inspect the engine compartment, engine and the floor with a LED flashlight not a regular bulb flashlight. The LED light will make the antifreeze slightly glow. If the heater core is leaking, the antifreeze will run out the air conditioning condensation drain hose, check with LED light.
Can you tell if the wetness is coolant/antifreeze or just water? If it is antifreeze/coolant then it is most likely caused by the heater core which is on the passensenter side of the vehicle. If it is fresh water, it is most likely caused by your drain (under the windshield) being clogged up and allowing the water from the drain to get into the fresh air intake and drain onto your floor boards.
The heater core is leaking into the heaterbox under the dash. Which is why you smell antifreeze/coolant inside. After a while (if left go too long) you'll notice antifreeze on the floor/carpet and possibly running out from under the vehicle as it flows out of the drain for the air conditioner (the heaterbox has a drain in it to let out the moisture produced by the a/c)
Three possibilities--the windshield is leaking water, the heater core is leaking antifreeze (should smell like antifreeze), or the air conditioner evaporator (near the heater core) has a plugged drain tube and the water condensed out of the warm air is running back into the cab. Hope this helps!
look under the car there are plugs located in the floor look to see if the plug has rotted , the ac condenser still condenses water even if it is not turned on check to see if the drain on the fire wall(located on the fire wall passenger side towards the bottom)is plugged with mud or debris, if it is not plugged the heater/ac unit shell may be cracked allowing water to seep, also check around the front window for leaks.
Air conditioning drain stopped up with debris (leaves,pine straw,sticks). Small tube sticking out from firewall with rubber elbow pointing down behind engine, passenger side. If elbow missing air will cause water to back up into vehicle. Another possibility, if your coolant is low heater core leaking.